Intermittent-motion device.



E. E. MAGGARD. INTERMITTENT MOTION DEVICE.

APPLICATION FILED DEC-16, 1913. 1,1 08 Patented Jan.11, 1916.

I r i I I I l WEE emits .ATENT QEFIQE.

ELISHA MAGGARD, or non-Emi io, KENTUCKY.

mTER ITTnNT-Mo'rmn nnvron Specification of LettersPatent.

Pa e tedJen-11 3,1915- Application fileil December 16, 1913. Serial l To. 807,108.

To all "whom it may concern v Be it known that I, ELISHA E. MAeeARn, a citizen of the United States, residing at Morehead, in the countyof Rowan and State of Kentucky, have invented new and useful Improvements in Intermittent-Motion Devices, of which the following is a Specificati'on.

the film across the aperture plate of the machine.

Although various type of lntermittent motion devlces have been used heretofore,

the majority of them being constructed upon the principle of a Geneva movement, many of these devices, aside from being complicated, cumbersome and subject to great wear, failto attain the desired result when: used in connectionwith motion picture apparatus.

'A-largenumber of these known devices are 7 Qconstructed on .the principle of a Maltese cross and in many instances have four or more points of contact wlth a pin carried flby' a rotating cam, and whereby, through theoperation of the cam, an intermittent rotation will be imparted to the member constructed in the nature of a Maltese cross.

'-I aim to provide a device of a s'ub's'tantially triangular construction and which specifically'comprehends a single member of a triangular constructlon, havlng intercom- ,municating grooves formed on the vertices of the 1nember, whereby, when the member is related to a revolving cam, having'a lprojecting .pin operable .in the grooves ofthe -member, the resultant intermittent motion ,zimparted to the shaft carrying thesaidmemher will be one of apositive nature "in which I the last mentioned shaft. will be intermit- ..tnn' rota-ted without the great wear and tear upon the triangular member as is occa- -,si.oned in the use of such. members mentioned [heretofore havlng' the configuratlon of a adaptable views, and in vvhich on the line 3 3. in' Fig. QZ FigQQisa,

'niembe'r in. different positions? Maltese Across. ;;By constructing the interdevice to conform .to a triangular configuration, I provide a structure which, with-a mittent motion producing member on any minimum amount of-wear and -with very 7 little resistance,-. Will result in aquicker shifting of the film on the motion i picture machine at the moment that the sourcegof l ght has been interrupted" bynthe ,u sual shutter and will furthermore greatly de duringlthe .moment of shifting, the same.

A still further embodiment ofthe invention residesin a simple means Whereby-Lthe intermittent motion producing IIIQmbQI'. can

' crease the pull and lstrainup'on .thewfilm be adjusted relativelytothecam andatlie 7 pin" thereof inorderto take up for any Wear wlnch'may result in the continuous use "of the device. I ii C In the further fdisclosureofthe invention reference is to be .had tothe accompany ng drawings, con stitutingfa part v ofthis ,sp eciaficatlon, 1n whichgs inilarcharacters of reference denote corresponding in allfthe Figure 1 is a fragmentary rear elevation of a motion ,picturelmachine, showing, my

device appliedthereto; Fig. '2 Qisa. horizontal sectional view taken throughnieidevie'; Fig. 3 1s averticaltransverse.sectionalview,v

, r. radii transverse sectional :v'iew af en io ziitt'e line 4:'4: in"F1g..-2y;fFig.f5 is alperspective view of the cam removed from'lthe casing. -;F 1g.- 6

..is. a perspective viewfofvtlie triangular Referring mgr 'paaietnan to the views, .1; d sclose jiio'tion picture machine 1 0 fsisting .of the'usual frame '11, 'a "driving .iiiiit 12, a'driving shaft 13',ca1 ried nthj frame and operable by th drivin 11 11it1l2f'aiid which may bein the nature of a motor. The

driving shaft, 13 preferably is arranged .in

a vertical position with l 'respec't to the frame and carrlesfa wheel 1a meshing .with'aworm 1'5'keyedtoja shaft 1 6 which is eccentr ally journaled on casing 17 iandflpr e'cts threin. p *Rigidly secured to the innQr end ofthe vshaft l6 and which, for the purpos ef lde- 'sc'ription I will term the driving sl aft', a disk 18, suitably keyed on the inner endlof the shaft to rotate ,vvitliin the casinjg '17. l The as: is as i91 meane flange 19 projecting from the inner face of the disk' and having a cut out portion 20, a lateral pin 21 being'also provided on the inner face of the disk 18 and lying outside of the flange 19 adjacent to the cut out portion 20 thereof. Thus it will be apparent that the disk and its component parts is in the nature of a cam.

A shaft 22 and which I will term a driven shaft is journaled'on a frame 23 supported on the frame 11 of the motion picture machine and projects into the casing 17 through an enlarged opening 2 1 in the casing, the said driven shaft 22 being also eccentrically arranged with respect to the casing as shown. Secured on the inner end of the driven shaft 22 is a triangular member 25 preferably formed of a single piece of material providing a body 26 having an integral sleeve 27,

grooves open at their outer ends and inter- 7 thus be apparent that when the driving shaft 16 is continuously rotated by the shaft communicating at their inner ends and on a line with the axis of the body 26, the sides 30 forming the arms 28 being similarly curved as shown. The casing 17 is preferably madein two parts so that wl en the sameare connected one part of the casing will have the free extremity of the driving shaft 16 extending into a suitable bearing 31 on thatpart of the casing. Now it will will continue to advance into the groove until it reaches its inner end and at which point the said groove communicates with the other grooves of the member. By this time the'triangular member will have made a sixth of a revolution and upon continuing the rotation of the disk 18 the pin Wlll be retreated through the groove which it has entered, thus further turning the trlangular member so that when the pin leaves the groove thereof the said member will have been rotated one third of a revolution and the next groove of the member will be in line to receive the pin when the disk 18 carrying the pin makes a complete revolution. Therefore, when a contlnuous rotation is imparted to the disk 18 the resulting operation of the driven shaft 22 will be that of a an intermittent rotation, and at each revolution of the disk a film wheel 32, carried on the driven shaft 22, willbe subjected to rotation of an, intermittent nature so that the usual film of the motion picture machine which is adapted to engage and operate over the film wheel, will be intermittently adof the triangular member, will cause the arms thereof to successively extend througl the cutout portion 20 of the clrcular flange, whereas while the pm of the disk, after having left one of the grooves of the triangular member, completes a revolution to again I enter a new groove of the member, one of the curved sides of the said member will lie against the circular flange of the disk, this construction being also clearly set forth in the views.

From the foregoing description it will 18. It will therefore be apparent that with v a triangular part of the character described operable in connection with a cam such as the disk and pin described, the angles between the arms of the member are greater than would be the case if there were four arms and the member constructed in the nature of a Maltese cross, and consequently the wear occasioned by the pin passing through the grooves of the triangular memher will be greatly reduced in that there will I not be any binding between the pin and the member inasmuch as the angles between the grooves and which in this instance wouldv be one hundred and twenty degrees would insure a smoother operation of the pin through the grooves than would be the case I if the angles between adjacent grooves were of less degree in size. M

The frame 23 terminates at one end in a head 33 of a flat nature and which abuts against a face of the casing 17. As mentioned heretofore, the driven member 22 projects through the enlarged opening 2 of the casing and in order to permit of an adjustment of the triangular member 25 with respect to the point of rotation of the disk 18 carrying the pin 21, 1 preferably have the casing 17 mounted to swing on the head 33 by means of a screw 34: passing through one side of the head of the casing, the said head 33 having loose connection with a screw rod threaded on the casing 17 and whereby, when the screw rod is operated, the head will be moved relatively to the casing, thus slightly moving the driven shaft relatively to the enlarged opening of the casing through which it extends and consequently resulting in the triangular member being moved slightly toward or away from the center of rotation of the disk 18 and which in this instance is the driving shaft 16. The driven shaft 22 therefore can be arranged to rotate loosely with respect to the driving shaft on account of the adjustable connection provided between the triangular member on the driven shaft and the disk and pin on the driving shaft.

Having thus claim:

1. In an intermittent motion mechanism, casing, a revoluble disk in the casing, a pin on the disk, a shaft, a frame having the shaft journaled thereon, with the shaft projecting into the said casing, a grooved member carried on the shaft and having the pin of the dish operating in the groove thereof when rotation is imparted to the said disk, whereby an intermittent rotation is imparted to the said shaft, and means connecting the said frame with the said casing for permitting of an adjustment of the said grooved member relatively to the said pin.

2. In an intermittent motion device, a casing, a driving shaft extending into the casing, a driven shaft extending into the easing, a. cam-like disk carried by the driving shaftand rotatable therewith within the'casing, a pin on the said disk, a grooved triangular member on the driven shaft and having the pin of the disk operating in the grooves thereof when rotation is imparted by the said disk to the driving shaft, whereby the said driven shaft will be intermitdescribed my invention, 1

tently rotated, and an adjusting device on the casing and cooperating withthe said frame for adjusting the said grooved mem+ ber relatively to the axis of rotation of the said disk. I

3. In an intermittent motion mechanism,

the combination with a frame, of a flat head onthe' frame, a driven shaft journaled on the frame, a casing carried by the frame, a driving shaft journaled on the casing and extending therein, a triangularly shaped member provided with intercommunicating grooves and supported on the said driven shaft, a disk on the driving shaft, a pin on the disk and operating in the intercommunieating grooves of the said member for im-' parting an intermittent motion to the driven shaft when the driving shaft is operated, and an adjusting member connecting the head of the said frame with the said casing for adjusting the said triangularly shapedmem.-I

ing shaft with the driven shaft for imparting intermittent motion to the driven shaft when the driving shaft is operated, and means on the casing and cooperating with the frameffor adjusting the driven shaft relatively to the driving shaft.

In testimony whereof I aflix my signature in presence of two witnesses.

ELISHA E. MAGGARD.

Witnesses:

F. A. Hos'rnn, E. EDMoNs'roN, Jr.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. U. 

